On Fri, Jul 12, 2024 at 9:17 AM Yu Kuai <yukuai1@xxxxxxxxxxxxxxx> wrote:
[...]
> >
> > After investigation, it turned out that choose_slow_rdev() does not set
> > the value of max_sectors in some cases and because of it,
> > raid1_read_request calls bio_split with sectors == 0.
> >
> > Fix it by filling in this variable.
> >
> > This bug was introduced in
> > commit dfa8ecd167c1 ("md/raid1: factor out choose_slow_rdev() from read_balance()")
> > but apparently hidden until
> > commit 0091c5a269ec ("md/raid1: factor out helpers to choose the best rdev from read_balance()")
> > shortly thereafter.
> >
> > Cc: stable@xxxxxxxxxxxxxxx # 6.9.x+
> > Signed-off-by: Mateusz Jończyk <mat.jonczyk@xxxxx>
> > Fixes: dfa8ecd167c1 ("md/raid1: factor out choose_slow_rdev() from read_balance()")
> > Cc: Song Liu <song@xxxxxxxxxx>
> > Cc: Yu Kuai <yukuai3@xxxxxxxxxx>
> > Cc: Paul Luse <paul.e.luse@xxxxxxxxxxxxxxx>
> > Cc: Xiao Ni <xni@xxxxxxxxxx>
> > Cc: Mariusz Tkaczyk <mariusz.tkaczyk@xxxxxxxxxxxxxxx>
> > Link: https://lore.kernel.org/linux-raid/20240706143038.7253-1-mat.jonczyk@xxxxx/
> >
> > --
>
> Thanks for the patch!
>
> Reviewed-by: Yu Kuai <yukuai3@xxxxxxxxxx>
Applied to md-6.11. Thanks!
Song
